Bookworm (by Raf Storr) is a book-cataloging application which allows you to define up to 100 categories. You can simultaneously open multiple windows to display different views of your data\; perform searches\; add and delete categories\; and sort your data by a variety of fields, such as author, title, and publisher, as well as user-defined fields. Individual records can be printed and marked to form a view group, and you can track books that you lent.